A question about how and/or works

[sinanxd2 (Fisher)]

function tween(Object, Properties, Value, Time, Style, Direction)
	Style = Style or Enum.EasingStyle.Quad
	Direction = Direction or Enum.EasingDirection.Out

	Time = Time or 0.5

	local propertyGoals = {}

	local Table = (type(Value) == "table" and true) or false

	for i,Property in pairs(Properties) do
		propertyGoals[Property] = Table and Value[i] or Value
	end
	local tweenInfo = TweenInfo.new(
		Time,
		Style,
		Direction
	)
	local tween = game:GetService("TweenService"):Create(Object,tweenInfo,propertyGoals)
	tween:Play()
end

I was browsing some open-source codes from advanced scripters when I found this function. The thing I did not understand is table variable. So, i think if type(Value) is table then it will return true if it is not it will return false, we will get

(true and true) or false
--or
(false and true) or false
--this is what I think will happen

1. why we need “and true” ?
   also
2. why Table and Value[i] or Value, can’t we just do Value[i] or Value?

[azqjanna]

The usage here is just mistaken. The usual way of doing this is:

local valueWithDefault = value or defaultValue

if value is nil or false, valueWithDefault will be set to defaultValue. The way this is used here has no effect because the result of == can only be true or false, and true by definition has no effect and so does or false

[Th1rust (Ozzy)]

Your examples are odd, but and/or exclude and include when certain circumstances allow something to happen. This also comes with the use of parenthesis, as Order of Operations is utilized.

For example,

if (Char.Humanoid.Health==0 and Char.Humanoid:GetState()==Enum.HumanoidStateType.Dead) or Char:FindFirstChild'Humanoid'==false then

The above statement proceeds if the Health is 0 and the state is Dead, but also proceeds if it cannot find the humanoid.

[sinanxd2 (Fisher)]

okay I understand. Can we just do Value[i] or Value? it should be
nil or value
OR
index or table
im not sure about what second one returns but it should be the first one which is index, right?

[azqjanna]

local Table should actually be called something like isTable because its true if Value is a table and false otherwise. This makes it so the second case gives Value[i] if Value is a table, otherwise just Value. This is a bad way of writing this though, since this could have just been an if statement.

[sinanxd2 (Fisher)]

Thanks for help guys, I would use if statement too but this takes less space I think thats why he did that. I will mark it as solution.